Blue zig zag screen

Apparently power went out while downloading iTunes update. Now I can't connect to my wifi only connect to local
Everything else connects wifi.

You mentioned iTunes so are you using a PC or a Mac?

Which Browser is this you are using?

You say downloading iTunes update so was this downloaded to your HDD or did you select the option of Install from the Net and the system fell over while iTunes was being installed?

Regardless of what System you are using it very much sounds as if the WiFi Stack has been corrupted so you'll need to rebuild it but that differs between the different OS's that could be involved here. Windows XP is different to Windows Vista and 7 and completely different to Windows 8.

Apples OSX again is another completely different kettle of Fish as well so I have no idea which rebuild instructions to pass on other than saying look in the Help Files of your Operating System.

Col